JPH01182944A - Production of optical information recording disk - Google Patents
Production of optical information recording diskInfo
- Publication number
- JPH01182944A JPH01182944A JP63006357A JP635788A JPH01182944A JP H01182944 A JPH01182944 A JP H01182944A JP 63006357 A JP63006357 A JP 63006357A JP 635788 A JP635788 A JP 635788A JP H01182944 A JPH01182944 A JP H01182944A
- Authority
- JP
- Japan
- Prior art keywords
- warpage
- film
- disk
- forming
- protective film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 230000001681 protective effect Effects 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 claims description 31
- 239000000428 dust Substances 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 230000003449 preventive effect Effects 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 43
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920005668 polycarbonate resin Polymers 0.000 description 4
- 239000004431 polycarbonate resin Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/24018—Laminated discs
- G11B7/24027—Layers; Shape, structure or physical properties thereof
Abstract
Description
【発明の詳細な説明】
（イ） 産業上の利用分野
本発明は、フンバク１−ディスクと称されるデンタルオ
ーディオディスク若しくは、光学式ビデオディスク等の
、光学的に情報が記録されているディスクの製造方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is applied to discs on which information is optically recorded, such as dental audio discs called Funbaku 1-discs or optical video discs. Regarding the manufacturing method.
（ロ） 従来の技術
］ンパクトディスクと称されるデジタルオーディオディ
スクが、例えば、′放送技術、昭和５６年４月号第３１
６〜３１７貞、「日経エレクトロニクス、 １９８１年
８月１７日号第１８７〜２０６頁等に紹介されている。(b) Prior art] A digital audio disc called a compact disc is described, for example, in 'Broadcasting Technology, April 1980, No. 31.
6-317 Sada, ``Nikkei Electronics, August 17, 1981 issue, pages 187-206, etc.
第４図は、従来の一般的なフンバクトディスクの構造を
示すものである。ポリカーボネート樹脂のディスク状基
盤（１）の−面に情報がピ・ソト（凹部）の形で形成き
れており、この上にアルミニウム反射膜（２）が設けら
れており、更にこの上に紫外線硬化型の樹脂保護層（３
）が設けられている。FIG. 4 shows the structure of a conventional general Funbakuto disk. Information is formed in the form of pi-soto (concavities) on the - side of a polycarbonate resin disc-shaped base (1), and an aluminum reflective film (2) is provided on this, and further on this is an ultraviolet curing film. Resin protective layer of mold (3
) is provided.
そして、この樹脂保護層（３）に２ベル（４）がシルク
印刷されている。ディスクの厚み（１）は略１．２ｍ’
ｎ程度である。Two bells (4) are silk-printed on this resin protective layer (3). The thickness of the disc (1) is approximately 1.2m'
It is about n.
斯かる光学式のディスクは、光による非接触外生である
ため、半永久的な寿命が期待されているが、実際の市場
における寿命については未知の点が多い。例えば、ディ
スクはプラスチック表面に高密度に微少なピントを彫り
こんだものであり、高い加工精度を必要とするものであ
るためわずかの変化（肉眼による観察では検出できない
稈度の）によって特性の劣化を生ずる。特にコンパクト
ディスクは車載用として従来の磁気テープ方式のカーオ
ーディオシステムにとってかわるものと期待されている
が、その際解決されなければならない問題の一つが、車
載条件におけるディスクの変形に関する問題である。斯
かるディスクの変形の中で重要なものにディスクの反り
がある。即ち、第５図に於いて、ディスクの基準面（タ
ーンテーブルに接する面０図に於いてＸで示す部分）に
対して垂直に入射する光（Ｂｉｎ）に対して反射光（Ｂ
ｏｕｔ）のなす反り角度（θ）を１，６゛以下とするこ
とが、良好な再生の為に必要である。従来のディスクは
高温（例えば１００℃）中に放置しておくと反りを生じ
、その後室温中においても、元に戻らない。Such optical disks are expected to have a semi-permanent lifespan because they are non-contact externally generated by light, but there are many unknowns about their actual lifespan in the market. For example, discs are made by carving fine points into the plastic surface at a high density, and require high processing precision, so slight changes (in culmness that cannot be detected with the naked eye) can cause deterioration of characteristics. will occur. In particular, compact discs are expected to replace conventional magnetic tape car audio systems for in-vehicle use, but one of the problems that must be solved is the problem of deformation of the disc under in-vehicle conditions. An important deformation of the disk is warping of the disk. That is, in Fig. 5, the reflected light (B
For good reproduction, it is necessary to keep the warping angle (θ) of 1.6° or less. Conventional disks warp when left in high temperatures (for example, 100° C.) and do not return to their original shape even at room temperature.
（ハ） 発明が解決しようとする課題
従来のコンパクトディスク等のディスクの製造設備をそ
のまま利用して、ディスク状基盤の情報が記録されてい
ない側の表面に、反り防止層を形成する場合には、次の
順に製造することが考えられる。(c) Problems to be Solved by the Invention When forming a warpage prevention layer on the surface of a disk-shaped substrate on the side where information is not recorded by using conventional manufacturing equipment for disks such as compact disks as is, , it is possible to manufacture them in the following order.
即う、コンパクトディスクの場合、ディスク状基盤（１
）の情報記録面（１ａ）を覆う反射膜く２）を形成した
後、この反射膜（２）を覆う保護膜（３）を形成し、こ
の保護膜のＬにラベル印刷を施こして従来のコンパクト
ディスクを作成する。その後、前記情報記録面（１ａ）
と反対側のディスク状基盤の表面に反り防止層を形成す
る。In other words, in the case of a compact disc, a disc-shaped base (1
After forming a reflective film 2) covering the information recording surface (1a) of ), a protective film (3) covering this reflective film (2) is formed, and a label is printed on L of this protective film. Create a compact disc. After that, the information recording surface (1a)
A warpage prevention layer is formed on the surface of the disc-shaped base opposite to the surface of the disc-shaped base.
しかしこの順序で製造する場合には、反り防止層が形成
きれる前の、情報記録面（１ａ）と反対側のディスク状
基盤（１）の表面に、反射膜（２）及び保護膜（３）の
形成工程を進める間に、塵、埃等が付着し、その上に反
り防止層を形成するとき、塵等の存在のために多数の凸
状の盛り上りが生じたり、また、ディスク状基盤の前記
表面に塵、埃等が付着していないときにも、その表面の
ぬれ性が時間の経過とともに悪くなり、反り防止層を形
成するとき、前記表面と反り防止層との間に気泡が残り
、反り防止層上に凸状の盛り上りが生ずる。However, when manufacturing in this order, a reflective film (2) and a protective film (3) are applied to the surface of the disk-shaped substrate (1) opposite to the information recording surface (1a) before the anti-warpage layer is completely formed. During the formation process, dust, dirt, etc. adhere to it, and when forming the anti-warp layer on top of it, many convex bulges may occur due to the presence of dust, etc., and the disc-shaped substrate may Even when no dust or dirt is attached to the surface, the wettability of the surface deteriorates over time, and when forming the anti-warp layer, air bubbles may form between the surface and the anti-warp layer. As a result, a convex bulge is formed on the anti-warpage layer.
これらの盛り上りは、反り防止層側から入射光を入射し
、その反射光から情報信号を再生する原理から、再生特
性に悪影響を及ぼすため、その盛り上りの発生を可及的
に抑える必要がある。These bulges have a negative effect on the reproduction characteristics due to the principle that incident light enters from the anti-warpage layer side and information signals are reproduced from the reflected light, so it is necessary to suppress the occurrence of these bulges as much as possible. be.
本発明はかかる点に鑑み発明されたものである。The present invention was invented in view of this point.
（ニ） 課題を解決するための手段
本発明は、かかる課題を解決ｒるため、一表面を情報の
記録面とするディスク状基盤、前記記録面を覆う反射膜
及びこの反射膜を覆う保護膜を有する光学式情報記録デ
ィスク、あるいはディスク状基盤、その一表面を覆う記
録膜及びこの記０膜を覆う保護膜を有する光学式情報記
録ディスクの製造方法において、前記ディスク状基盤の
他表面に反り防止層を形成Ｃる工程と、ディスク状基盤
の一表面に前記反射膜又は前記記録膜を形成すイ）工程
と、この反射膜又は記録膜を覆う保護膜を形成する工程
と、を有し、この工程順に製造することを特徴とするも
のである。(d) Means for Solving the Problems In order to solve the problems, the present invention provides a disk-shaped substrate having one surface as an information recording surface, a reflective film covering the recording surface, and a protective film covering the reflective film. or a method for manufacturing an optical information recording disc having a disc-shaped substrate, a recording film covering one surface thereof, and a protective film covering the recording film, wherein the other surface of the disc-shaped substrate is warped. A step of forming a prevention layer, a step of forming the reflective film or the recording film on one surface of the disc-shaped substrate, and a step of forming a protective film to cover the reflective film or the recording film. , is characterized in that it is manufactured in this order of steps.
また、本発明は、前記保護膜の形成工程において、前記
反り防止層を形成したディスク状基盤の反りを測定し、
この反りを打消すように前記保護膜の厚みを調整するこ
とを特徴とするものである。Further, the present invention provides, in the step of forming the protective film, measuring the warpage of the disk-shaped substrate on which the warpage prevention layer is formed;
The present invention is characterized in that the thickness of the protective film is adjusted to cancel this warping.
〈ホ） 作用
ディスク状基盤の情報が記録される側と反対側の表面に
、反り防止層を形成し、その後に前記情報記録側に、反
射膜又は記録膜を形成し、続いてこれらの膜を覆う保護
膜を形成する本発明においては、前記表面に、前記６膜
の形成時に傷、塵、埃等が付くことがなく、またこれら
の膜形成工程前に反り防止層を形成することから、前記
表面のぬれ性がよく、反り防止層との間に気泡を生ずる
ことも少なくなる。<E) Form a warpage prevention layer on the surface of the working disc-shaped substrate opposite to the side on which information is recorded, then form a reflective film or a recording film on the information recording side, and then apply these films. In the present invention, scratches, dust, dust, etc. are not attached to the surface during the formation of the six films, and a warp prevention layer is formed before the process of forming these films. , the surface has good wettability, and less air bubbles are formed between the surface and the anti-warpage layer.
また、保護膜の形成工程において、反り防止層を形成し
たディスク状基盤の反りを測定し、この反りを打消すよ
うに、前記保護膜の厚みを調整する発明にあっては、デ
ィスク状基盤の反りを可及的に抑えることができる。In addition, in the process of forming the protective film, the warpage of the disc-shaped substrate on which the warp prevention layer is formed is measured, and the thickness of the protective film is adjusted to cancel the warp. Warpage can be suppressed as much as possible.
くべ）実施例 本発明の一実施例を図面に基づいて説明する。Kube) Example An embodiment of the present invention will be described based on the drawings.
第１図はディスクの部分断面図であり、情報が記録され
た表面とは反対側のディスク状基盤（１）の表面に反り
防止層（５）を形成したディスクの例を示している。デ
ィスク状基盤（１）の反り防止層（５）と反対側面は、
ピ・７トによる情報の記録面（１ａ）ときれ、その表面
はアルミニウム反射膜（２）にて覆われる。この反射膜
の表面は保護膜（３）にて覆われ、保護膜上にはラベル
（、，５／）ｆｒ＜シルク印刷されている。FIG. 1 is a partial sectional view of a disk, showing an example of a disk in which a warp prevention layer (5) is formed on the surface of a disk-shaped base (1) opposite to the surface on which information is recorded. The side opposite to the warpage prevention layer (5) of the disc-shaped base (1) is
The information recording surface (1a) formed by P.7 is cut off, and the surface thereof is covered with an aluminum reflective film (2). The surface of this reflective film is covered with a protective film (3), and a label (,,5/) fr<< is silk-printed on the protective film.
このディスクは次の工程を経て製造される。This disc is manufactured through the following steps.
第２図に示すように、第１工程にて、ポリカーボネート
樹脂のプレスにより厚き約１．２ｍのディスク状基盤（
１）色形成する。この第１工程において、第２図中上面
側は、プレス金型にてピット（１ｂ）が形成され、記録
面（１ａ）とされる。As shown in Fig. 2, in the first step, a disk-shaped substrate (about 1.2 m thick) is formed by pressing polycarbonate resin.
1) Form color. In this first step, pits (1b) are formed on the upper surface side in FIG. 2 using a press mold to form a recording surface (1a).
ディスク状基盤（１）の形成直後に、基盤の下面に、表
面硬度２Ｈ〜３Ｈ以上であり、収縮率の低い紫外線硬化
樹脂にて厚さ１〜２μｍの反り防止層（５）が形成され
る（第２工程）。Immediately after forming the disk-shaped base (1), a warpage prevention layer (5) with a thickness of 1 to 2 μm is formed on the lower surface of the base using an ultraviolet curable resin with a surface hardness of 2H to 3H or more and a low shrinkage rate. (Second step).
第３工程では、記録面（１ａ）上にアルミニ１クム反射
膜（２）を約５００〜１０００人厚に蒸着又はスバ・／
クーにて形成する。In the third step, an aluminum 1 um reflective film (2) is deposited on the recording surface (1a) to a thickness of approximately 500 to 1000 layers.
Formed in Ku.
第４工程では、反射膜（２）上に、表面硬度がＨ〜２Ｈ
程度の紫外線硬化樹脂にて厚さ３〜６μｍの保護膜（３
）を形成する。In the fourth step, the surface hardness is H to 2H on the reflective film (2).
A protective film with a thickness of 3 to 6 μm (3
) to form.
続いて、第５工程は、保護膜上に、ラベル（４）のシル
ク印刷の工程である。Subsequently, the fifth step is a step of silk-screen printing a label (4) on the protective film.
前記反り防止Ｊｌ（５）及び保護膜（３）は、樹脂剤を
滴下し、遠心力にてコート膜を形成するスピンコード法
により形成される。また、反り防止１のない状態におい
て、反射膜及び保護膜を形成することにより生ずるディ
スクの反りが判明しているときには、その反りを打消す
ように反り防止層の材質及び厚みが選定され、製造工程
上予め反り防止層が形成される。The warpage prevention film (5) and the protective film (3) are formed by a spin code method in which a resin agent is dropped and a coat film is formed using centrifugal force. In addition, when it is known that the disc is warped due to the formation of the reflective film and the protective film in the absence of warp prevention 1, the material and thickness of the warp prevention layer are selected and manufactured to cancel the warp. A warpage prevention layer is formed in advance during the process.
この反り防止７１（５）と保護膜（３）はその機能が異
なる。即ち、反り防止層（５）は、人出射光側に位置す
るため、光学的均質性が要求され、ディスク状基盤（１
）の傷つき易さを防止する上から硬い届であることが要
求きれる。このため反り防止層（５）としては、粘度が
低く薄層の形成が容易であり、硬化時には硬度が大きい
樹脂剤が望ましい。The warpage prevention 71 (5) and the protective film (3) have different functions. That is, since the anti-warpage layer (5) is located on the side of the human output light, optical homogeneity is required, and the anti-warpage layer (5) is required to have optical homogeneity.
) is required to have a hard cover to prevent it from being easily damaged. Therefore, as the anti-warp layer (5), a resin agent is desirable that has a low viscosity, is easy to form a thin layer, and has a high hardness when cured.
これに対し、保護膜（３）は、人出射光と無関係の位置
に形成されるため、光学的均質性は必要ではなく、多少
の厚みムラも問題とならないが、ディスク状基盤（１）
に刻印された記録面（１ａ）における微小な凹凸を保護
すると共に反射膜（２）に対して防湿することが要求さ
れる。このため、保護膜としては硬化時の硬度がむしろ
高くない方がよい。On the other hand, since the protective film (3) is formed at a position unrelated to the human emitted light, optical homogeneity is not required, and some thickness unevenness is not a problem.
It is required to protect the minute irregularities on the recording surface (1a) engraved on the recording surface (1a) and to moisture-proof the reflective film (2). For this reason, it is preferable that the hardness of the protective film at the time of curing is not high.
ディスク状基盤（１）の反り防止の点からは、反り防止
層（５）と保護膜（３）の収縮力が釣合うことがｆｆ１
Ｄである。厚みの異なる反り防止層く５）と保護膜（３
）で反り力の鈎合いをとるためには、この反り防止層と
保護膜の収縮力が異なっていることが必要である。From the point of view of preventing warpage of the disk-shaped substrate (1), it is important that the shrinkage forces of the warpage prevention layer (5) and the protective film (3) are balanced.
It is D. Anti-warp layer 5) and protective film (3) with different thicknesses
), it is necessary that the shrinkage forces of this anti-warp layer and the protective film be different in order to balance the warping forces.
上記実施例では、具体的に、反り防止層（５）として、
大日本インキ（株）製の商品名ダイキュアクリア’ＴＨ
−１３Ｊを使用し、保護膜（３）として同社製の同ゝＥ
Ｘ−３０１、を使用した。前者は粘性が低く、１〜２μ
ｍ程度の薄い−様な膜層の形成が容易であり、鉛筆硬度
で３Ｈａ度の耐スクラッチ性のよい膜層を形成でき、そ
の体積収縮率は約１２％程度である。後者は体積収縮率
はその約半分であり、反射膜（２）の保護を兼ねるため
、厚さは３〜６μｍ１１ｊ、度必要である。この両者に
よって、ディスクの反りに対して釣合いのとれたものと
なっている。尚、後者に代えて同社製の同ゝ５Ｏ−１７
Ｊを用いてもよい。In the above example, specifically, as the warpage prevention layer (5),
Product name: Daicure Clear 'TH, manufactured by Dainippon Ink Co., Ltd.
-13J was used, and the same company's E was used as the protective film (3).
X-301 was used. The former has low viscosity, 1-2μ
It is easy to form a film layer that is as thin as 0.3 m, has a pencil hardness of 3 Ha, and has good scratch resistance, and its volume shrinkage rate is about 12%. The volume shrinkage rate of the latter is about half of that, and since it also serves to protect the reflective film (2), the thickness is required to be 3 to 6 μm 11j. Both of these provide a balance against warping of the disc. In addition, instead of the latter, the same 5O-17 made by the same company
J may also be used.
ディスクの反り防止の点から、反り防止層（５〉及び保
護膜（３〉として、種々の材料を用いることができるが
、アクリル系紫外線硬化型の樹脂は、作業性及び特性選
択の自由度の点から好ましい材料である。From the viewpoint of preventing warpage of the disc, various materials can be used for the warpage prevention layer (5) and the protective film (3). From this point of view, it is a preferable material.
第２図に丞す実施例においては、保護膜（３）を形成す
るための滴下４Ｍ１ｉを予め一定量に定めているが、こ
の保護膜形成用の樹脂の滴下量を、反り防止層（５）を
形成した後のディスク状基盤（１）の反りを測定し、そ
の測定結果に基づいて定めるようにすれば、ディスクの
反りをより一考少なくすることができる。このようにす
る実施例を第３図に基づいて説明する。In the embodiment shown in FIG. 2, the amount of the resin to be dropped 4M1i for forming the protective film (3) is predetermined to be a certain amount. ) After forming the disk-shaped substrate (1), the warpage can be further reduced by measuring the warpage of the disk-shaped substrate (1) and determining the warpage based on the measurement results. An embodiment that does this will be explained based on FIG. 3.
プレス成形されたディスク状基盤（１）はほとんど反り
を持っていないが、このディスク状基盤に反り防止ｆｆ
ｊ（５）を形成すると、この反り防止層の収縮力によっ
て、記録面（１ａ）を凸にする反りをわずかながら生ず
る。The press-molded disk-shaped base (1) has almost no warpage, but this disk-shaped base has a warpage prevention functionff.
When the recording surface (1a) is formed, the shrinkage force of this anti-warp layer causes a slight warp that makes the recording surface (1a) convex.
反り防止層（５）を形成した後、記録面（１ａ）上に反
射膜（２）を形成し、その後に、反射膜（２）を覆う保
護膜（３）を形成することは第２図に関して説明した工
程と同じであるが、保護膜（３）の形成に先立って、反
り防止層（５）の収縮力による反りを検出する工程を（
＝ｆ加している。After forming the anti-warp layer (5), a reflective film (2) is formed on the recording surface (1a), and then a protective film (3) is formed to cover the reflective film (2) as shown in Fig. 2. The process is the same as that described above, but prior to the formation of the protective film (3), the process of detecting warpage due to shrinkage force of the warp prevention layer (5) is performed (
= f is added.
反り防止層く５）の形成−［程の後に、反則＠（２）の
形成工程の後でもよいが、ディスク状基盤（１〉の反り
状況を検出する。この反り形状は浅皿状であり、反りの
大きさを検出するには、半径距離が一定の位置でディス
ク状基盤（１）を１回転させたときの反り角度の最大値
を検出すればよい。たとえば、直径１２（”ｒｌｌのデ
ィスク状基盤であれば、半径５ｃｍの位置で、反り角度
を測定する。After the formation of the warp prevention layer 5), the warpage of the disc-shaped base (1) is detected, although this may be done after the warp formation step (2).This warp shape is shallow dish-like. To detect the magnitude of warpage, it is sufficient to detect the maximum value of the warp angle when the disk-shaped base (1) is rotated once at a position with a constant radial distance. In the case of a disk-shaped base, the warp angle is measured at a position with a radius of 5 cm.
この測定は、第３図に示すように、レーザー光Ｒ（６）
からレーザー光（７）を小さな入射角度、たとえば入射
角５度で照射し、反射光のスポット位置を光位置検出装
置（８）にて噴出することにより行う、この光位置検出
装置は光位置検出素子を有し、この素子の出力にて反り
情報をアナログ信号として取り出すことができる。この
信号を利用して、反りを打消すための保護膜〈３）の形
成樹脂の滴下量を制御装置ｔ（９）にて算出し、この算
出信号に基づいて、滴下量ｆｌ（１０）を制御する。こ
の滴下装置から滴下きれた樹脂にて保護膜（３）が形成
されると、その収縮力にてディスク状基盤（１）は反り
がほとんどない状態となる。制御装置（９）はあらゆる
反り角度に対する最適滴下量に関する情報を予め内蔵し
ており、各反り防止Ｒ（５）を形成したときの各ディス
ク状基盤（１）の反り情報に対する最適滴下量の信号を
生ずるようになっている。This measurement is carried out using a laser beam R(6) as shown in FIG.
This optical position detecting device is an optical position detecting device that performs optical position detection by emitting a laser beam (7) at a small incident angle, for example, 5 degrees, and ejecting the spot position of the reflected light by an optical position detecting device (8). It has an element, and warp information can be extracted as an analog signal at the output of this element. Using this signal, the control device t(9) calculates the dropping amount of the resin forming the protective film <3) to cancel the warpage, and based on this calculation signal, the dropping amount fl(10) is calculated. Control. When the protective film (3) is formed with the resin dripped from this dripping device, the disc-shaped base (1) is brought into a state with almost no warpage due to its shrinkage force. The control device (9) has pre-built-in information regarding the optimum dripping amount for all warp angles, and uses a signal of the optimum dripping amount for each disk-shaped base (1) warp information when forming each warp prevention R (5). It is designed to cause
前記反り防止層に関して、ディスク状基盤としてポリカ
ーボネート樹脂を用いる場合、この樹脂の屈折率は１．
５５程度であり、この上に屈折率１．２４程度の膜層を
１６００人の厚みで形成することにより、理想的な反り
防止層となる。また、この場合に反り防止層の屈折率と
してはポリカーボネート樹脂の屈折率より小さい１．４
５程度の材料を選ぶことにより、ある程度の反り藺止効
果をもたゼることができる。Regarding the warpage prevention layer, when a polycarbonate resin is used as the disk-shaped base, the refractive index of this resin is 1.
55, and by forming a film layer having a refractive index of about 1.24 to a thickness of about 1600 on this, an ideal warpage prevention layer can be obtained. In this case, the refractive index of the warpage prevention layer is 1.4, which is smaller than the refractive index of the polycarbonate resin.
By selecting a material with a rating of about 5, it is possible to have a certain degree of warping prevention effect.
以上の実施例においては、一表面を記録面（１ａ）とす
るディスク状基盤（１）、反射膜（２）及び保護膜〈３
）を有する光学式情報記録ディスク、いわゆる再生専用
型ディスクであったが、本発明はかかるディスクに限定
されるものではなく、ディスク状基盤、その−面を覆う
記録膜及びこの記録膜を覆う保護膜を有する光学式情報
記録ディスク、いわゆる追加記録型あるいは書換可能デ
ィスクにも適用することができる。In the above embodiment, a disk-shaped substrate (1) with one surface as a recording surface (1a), a reflective film (2) and a protective film <3
), which is a so-called read-only type disc, but the present invention is not limited to such a disc, but includes a disc-shaped base, a recording film covering the surface thereof, and a protection film covering the recording film. The present invention can also be applied to optical information recording disks having a film, so-called additional recording type or rewritable disks.
尚、図面は明瞭を期すため誇張して表わしている。Note that the drawings are exaggerated for clarity.
（ト）発明の効果
本発明によれば、ディスク状基盤の一表面に反射膜又は
記録膜を形成する前に、ディスク状基盤の他表面に反り
防止層を形成するため、前記反射膜又は記録膜、さらに
はこれらの膜の上の保護膜の形成工程中に、前記他表面
に傷がついたり、塵、埃が付着することがなく、従って
これらの塵等によって反り防止層の表面に突部あるいは
突条等が生じなく、少なくとも再生特性に悪影響を及ぼ
さない反り防止層を形成することができる。(G) Effects of the Invention According to the present invention, before forming a reflective film or a recording film on one surface of a disc-shaped substrate, an anti-warping layer is formed on the other surface of the disc-shaped substrate. During the process of forming the film and the protective film on these films, the other surfaces will not be scratched or dust will not adhere to the surface of the anti-warpage layer. It is possible to form a warpage prevention layer that does not have any parts or protrusions or the like and does not have any adverse effect on the playback characteristics.
また、この反り防止層を形成したときのディスり状基盤
の反り状態を検出して前記保護膜の厚みを調整するとき
には、ディスクの反りをより一層少なくすることができ
る。Moreover, when the thickness of the protective film is adjusted by detecting the warpage state of the disc-shaped substrate when the warpage prevention layer is formed, the warpage of the disc can be further reduced.
第１図乃至第３図は本発明の実施例を示し、第１図は光
学式情報記録ディスクの部分断面図、第２図は本発明に
よる製造方法の一実施例を示す工程説明図、第３図は他
の実、１ａＶＡ＋におけるディスク状基盤の反りを測定
して保護膜の厚みを調整する装置の説明図、第４図及び
第５図は従来の光学式情報記録ディスクを示し、第４図
は断面図、第５図は反り状況を示す部分断面図である。
（１ａ）・・・記録面、（１）・・・ディスク状基盤、
（２）・・・反射膜、（３）・・・保護膜、（５）・・
・反り防止層、（６）・・・レーザー光源、（８）・・
・光位置検出装置、（９）・・・制御装置、（１０）・
・・滴下装置。1 to 3 show an embodiment of the present invention, FIG. 1 is a partial sectional view of an optical information recording disk, FIG. 2 is a process explanatory diagram showing an embodiment of the manufacturing method according to the present invention, and FIG. Figure 3 is an explanatory diagram of a device for adjusting the thickness of a protective film by measuring the warpage of a disc-shaped substrate at 1aVA+, and Figures 4 and 5 show a conventional optical information recording disc. The figure is a sectional view, and FIG. 5 is a partial sectional view showing the state of warpage. (1a)...recording surface, (1)...disk-shaped base,
(2)... Reflective film, (3)... Protective film, (5)...
・Warp prevention layer, (6)...laser light source, (8)...
・Optical position detection device, (9)...control device, (10)・
...Dripping device.
Claims (2)
記記録面を覆う反射膜及びこの反射膜を覆う保護膜を有
する光学式情報記録ディスク、あるいはディスク状基盤
、その一表面を覆う記録膜及びこの記録膜を覆う保護膜
を有する光学式情報記録ディスクの製造方法において、 前記ディスク状基盤の他表面に反り防止層を形成する工
程と、 ディスク状基盤の一表面に前記反射膜又は前記記録膜を
形成する工程と、 この反射膜又は記録膜を覆う保護膜を形成する工程と、 を有し、この工程順に製造することを特徴とする光学式
情報記録ディスクの製造方法。(1) An optical information recording disk having a disk-shaped substrate with one surface as an information recording surface, a reflective film covering the recording surface, and a protective film covering the reflective film, or a disk-shaped substrate, and recording covering one surface thereof. A method for manufacturing an optical information recording disk having a film and a protective film covering the recording film, comprising: forming a warpage prevention layer on the other surface of the disc-shaped substrate; A method for manufacturing an optical information recording disk, comprising: a step of forming a recording film; and a step of forming a protective film covering the reflective film or the recording film, and is manufactured in this order of steps.
を形成したディスク状基盤の反りを測定し、この反りを
打消すように前記保護膜の厚みを調整することを特徴と
する請求項（１）記載の光学式情報記録ディスクの製造
方法。(2) In the step of forming the protective film, the warpage of the disk-shaped substrate on which the warp prevention layer is formed is measured, and the thickness of the protective film is adjusted to cancel the warp. 1) The method for manufacturing the optical information recording disk described above.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63006357A JP2517341B2 (en) | 1988-01-14 | 1988-01-14 | Method for manufacturing optical information recording disk |
| US07/293,748 US4957776A (en) | 1988-01-14 | 1989-01-03 | Method of manufacturing optical disc |
| KR1019890000387A KR920000425B1 (en) | 1988-01-14 | 1989-01-14 | Process for optical information recording disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63006357A JP2517341B2 (en) | 1988-01-14 | 1988-01-14 | Method for manufacturing optical information recording disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01182944A true JPH01182944A (en) | 1989-07-20 |
| JP2517341B2 JP2517341B2 (en) | 1996-07-24 |
Family
ID=11636116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63006357A Expired - Lifetime JP2517341B2 (en) | 1988-01-14 | 1988-01-14 | Method for manufacturing optical information recording disk |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4957776A (en) |
| JP (1) | JP2517341B2 (en) |
| KR (1) | KR920000425B1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03219445A (en) * | 1990-01-25 | 1991-09-26 | Fuji Photo Film Co Ltd | Production of optical information recording medium |
| WO2002101736A1 (en) * | 2001-06-07 | 2002-12-19 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium production method |
| WO2003017266A1 (en) * | 2001-08-10 | 2003-02-27 | Tdk Corporation | Optical recording medium |
| JP2003059097A (en) * | 2001-08-10 | 2003-02-28 | Tdk Corp | Optical recording medium |
| WO2003081584A1 (en) * | 2002-03-27 | 2003-10-02 | Matsushita Electric Industrial Co., Ltd. | Multi-layered optical information recording medium manufacturing method |
| WO2004021343A1 (en) * | 2002-08-30 | 2004-03-11 | Sony Corporation | Optical disk |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549952A (en) * | 1992-06-13 | 1996-08-27 | Sony Corporation | Optical information medium and method for printing on the surface of the medium |
| CA2111646A1 (en) * | 1992-12-25 | 1994-06-26 | Shin Aihara | Optical recording medium |
| JPH10326435A (en) * | 1997-03-25 | 1998-12-08 | Sony Corp | Optical recording medium and optical disk device |
| US6468638B2 (en) * | 1999-03-16 | 2002-10-22 | Alien Technology Corporation | Web process interconnect in electronic assemblies |
| US7300690B2 (en) * | 2001-03-29 | 2007-11-27 | General Electric Company | Radial tilt reduced media |
| US6606247B2 (en) | 2001-05-31 | 2003-08-12 | Alien Technology Corporation | Multi-feature-size electronic structures |
| US6716505B2 (en) * | 2001-08-31 | 2004-04-06 | General Electric Company | Storage medium for data with improved dimensional stability |
| US7214569B2 (en) | 2002-01-23 | 2007-05-08 | Alien Technology Corporation | Apparatus incorporating small-feature-size and large-feature-size components and method for making same |
| US7253735B2 (en) | 2003-03-24 | 2007-08-07 | Alien Technology Corporation | RFID tags and processes for producing RFID tags |
| DE102004025684A1 (en) | 2004-04-29 | 2005-11-17 | Osram Opto Semiconductors Gmbh | Optoelectronic semiconductor chip and method for forming a contact structure for electrically contacting an optoelectronic semiconductor chip |
| US7688206B2 (en) | 2004-11-22 | 2010-03-30 | Alien Technology Corporation | Radio frequency identification (RFID) tag for an item having a conductive layer included or attached |
| US7385284B2 (en) * | 2004-11-22 | 2008-06-10 | Alien Technology Corporation | Transponder incorporated into an electronic device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6057552A (en) * | 1983-09-07 | 1985-04-03 | Fuji Photo Film Co Ltd | Laser recording medium |
| JPS6163942A (en) * | 1984-09-05 | 1986-04-02 | Sanyo Electric Co Ltd | Optical information recording disk |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4387114A (en) * | 1980-11-20 | 1983-06-07 | Verbatim Corporation | Spindle aperture reinforcement for a floppy disk |
| US4514439A (en) * | 1983-09-16 | 1985-04-30 | Rohm And Haas Company | Dust cover |
| JP2597967B2 (en) * | 1984-03-09 | 1997-04-09 | 株式会社東芝 | Magnetic recording media |
| JPS61180946A (en) * | 1985-02-06 | 1986-08-13 | Matsushita Electric Ind Co Ltd | Information recording disk |
| JPS61198114A (en) * | 1985-02-28 | 1986-09-02 | Hitachi Ltd | Coupling structure of structure with large difference in coefficient of thermal expansion |
-
1988
- 1988-01-14 JP JP63006357A patent/JP2517341B2/en not_active Expired - Lifetime
-
1989
- 1989-01-03 US US07/293,748 patent/US4957776A/en not_active Expired - Lifetime
- 1989-01-14 KR KR1019890000387A patent/KR920000425B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6057552A (en) * | 1983-09-07 | 1985-04-03 | Fuji Photo Film Co Ltd | Laser recording medium |
| JPS6163942A (en) * | 1984-09-05 | 1986-04-02 | Sanyo Electric Co Ltd | Optical information recording disk |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03219445A (en) * | 1990-01-25 | 1991-09-26 | Fuji Photo Film Co Ltd | Production of optical information recording medium |
| WO2002101736A1 (en) * | 2001-06-07 | 2002-12-19 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium production method |
| US7820234B2 (en) | 2001-06-07 | 2010-10-26 | Panasonic Corporation | Manufacturing method of optical information recording medium |
| WO2003017266A1 (en) * | 2001-08-10 | 2003-02-27 | Tdk Corporation | Optical recording medium |
| JP2003059097A (en) * | 2001-08-10 | 2003-02-28 | Tdk Corp | Optical recording medium |
| WO2003081584A1 (en) * | 2002-03-27 | 2003-10-02 | Matsushita Electric Industrial Co., Ltd. | Multi-layered optical information recording medium manufacturing method |
| US7497916B2 (en) | 2002-03-27 | 2009-03-03 | Panasonic Corporation | Method of manufacturing multilayer optical information recording medium |
| WO2004021343A1 (en) * | 2002-08-30 | 2004-03-11 | Sony Corporation | Optical disk |
| US7596077B2 (en) | 2002-08-30 | 2009-09-29 | Sony Corporation | Optical disk |
| US7962927B2 (en) | 2002-08-30 | 2011-06-14 | Sony Corporation | Optical disk |
Also Published As
| Publication number | Publication date |
|---|---|
| KR890012283A (en) | 1989-08-25 |
| JP2517341B2 (en) | 1996-07-24 |
| KR920000425B1 (en) | 1992-01-13 |
| US4957776A (en) | 1990-09-18 |
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